Within the past year, adoption of Microsoft Azure grew from 45% to 52% among survey respondents, while AWS is now used by 61% of companies surveyed, the study found.

Most companies have a multi-cloud strategy, using an average of five public and private clouds, so companies may choose to use both Microsoft Azure and AWS, the report found.

Amazon Web Services (AWS) may be the leader in cloud computing, but Microsoft Azure is rapidly catching up.

Within the past year, Microsoft Azure adoption grew from 45% to 52%, according to Flexera’s annual RightScale 2019 State of the Cloud Report. Flexera, which helps companies manage their software and cloud infrastructure, surveyed 786 IT professionals in small, medium, and large companies.

In comparison with Microsoft, Amazon Web Services (AWS) is used by 61% of companies, the survey indicated, down from 64% last year. Among the largest enterprises, Microsoft adoption is at an even higher share of 60%, while 67% of those enterprises use AWS.

Google remains in third place, with the use of Google Cloud increasing only slightly. Nineteen percent of companies use Google Cloud, up from 18% last year, the survey indicated. That being said, enterprises showed the most interest in using Google Cloud for future projects — 41% said they are interested in experimenting with it.

Keep in mind, too, that the study indicated that 84% of enterprises have a multi-cloud strategy, meaning that they’re relying on a mixture of different cloud vendors and their own data centers to host their computing infrastructure. The survey showed that companies use five clouds on average overall, either from a big vendor or in their own data center — which is why the percentages add up to more than 100%.

AWS was a $25.65 billion business in 2018. Last quarter, sales at AWS rose 45% from the period a year ago to $7.4 billion. It generated $2.2 billion in operating income last quarter, which was more than two-thirds of Amazon‘s entire operating income for the period.

In comparison, last quarter, Microsoft Azure saw 76% revenue growth from the same period a year ago, but the company doesn’t break out specific figures, making it hard to compare exactly.